	function goTopEx() {
		var obj = document.getElementById("goTopBtn");
		function getScrollTop() {
			return document.documentElement.scrollTop + document.body.scrollTop;
		}
		function setScrollTop(value) {
			if (document.documentElement.scrollTop) {
				document.documentElement.scrollTop = value;
			} else {
				document.body.scrollTop = value;
			}
		}
		window.onscroll = function() {
			getScrollTop() > 0 ? obj.style.display = ""
					: obj.style.display = "none";
		}
		obj.onclick = function() {
			var goTop = setInterval(scrollMove, 10);
			function scrollMove() {
				setScrollTop(getScrollTop() / 1.1);
				if (getScrollTop() < 1)
					clearInterval(goTop);
			}
		}
	}
